<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist" stripe border>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <!-- eslint-disable-next-line -->
          <template v-slot:default="scope">
            <el-row
              :class="['bdbottom', index1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, index1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                  {{ item1.authName }}
                </el-tag>
                <i class="el-icon-caret-right"></i
              ></el-col>
              <!-- 渲染二、三级权限 -->
              <el-col :span="19">
                <el-row
                  :class="[index2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, index2) in item1.children"
                  :key="item2.id"
                >
                  <!-- 二级权限 -->
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                    >
                      {{ item2.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    
                    <el-tag
                      v-for="(item3, index3) in item2.children"
                      :key="index3"
                      type="warning"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
              {{ scope.row }}
            </pre>对象格式展示数据 -->
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"> </el-table-column>
        <el-table-column label="角色名称" prop="roleName"> </el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"> </el-table-column>
        <el-table-column label="操作" width="300px">
          <template v-slot:default="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeRoleById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 添加角色对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 内容主体区 -->
      <el-form
        :model="addRolesForm"
        :rules="addRolesFormRules"
        ref="addRolesFormRef"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addRolesForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addRolesForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>

      <!-- 底部按钮区 -->
      <div slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </div>
    </el-dialog>

    <!-- 修改用户对话框 -->
    <el-dialog
      title="修改角色"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="80px"
      >
        <el-form-item label="角色名称">
          <el-input v-model="editForm.roleName" disabled></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRoleInfo">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightsList"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      //所有角色列表数据
      rolelist: [],
      //控制添加角色对话框的显示与隐藏
      addDialogVisible: false,
      //添加角色的表单数据
      addRolesForm: {},
      addRolesFormRef: {},
      //添加角色的表单验证规则
      addRolesFormRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
        ],
      },
      //控制修改角色对话框的显示与隐藏
      editDialogVisible: false,
      //查询到的用户信息对象
      editForm: { roleName: "", roleDesc: "" },
      //修改角色描述 的验证规则对象
      editFormRules: {
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
        ],
      },
      //控制分配权限对话框 的显示与隐藏
      setRightDialogVisible: false,
      //角色拥有的权限 数据
      rightsList: [],
      //树形控件 的属性绑定对象
      treeProps: {
        label: "authName",
        children: "children",
      },
      //默认选中节点 的ID值数组
      defKeys: [],
      //当前即将分配权限的角色id
      roleId: "",
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //获取 所有角色 的列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败！");
      }
      this.rolelist = res.data;
      //console.log(this.rolelist);
    },
    //监听 添加角色 对话框的关闭事件
    addDialogClosed() {
      this.$refs.addRolesFormRef.resetFields();
    },
    //点击 确定按钮，添加角色
    async addRole() {
      const { data: res } = await this.$http.post("roles", this.addRolesForm);
      //console.log(res);
      if (res.meta.status !== 201) {
        this.$message.error("添加角色失败！");
      }
      this.$message.success("添加角色成功！");
      //关闭添加对话框
      this.addDialogVisible = false;
      //重新获取用户列表
      this.getRolesList();
    },
    //展示 修改角色信息 的对话框
    async showEditDialog(id) {
      //console.log(id)
      const { data: res } = await this.$http.get("roles/" + id);
      if (res.meta.status !== 200) {
        return this.$message.error("查询用户失败！");
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    //监听 修改角色对话框 的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields();
    },
    //点击 确定按钮，修改角色描述
    /* async editRoleInfo() {
      const { data: res } = await this.$http.put(
        "roles/" + this.editForm.roleId,
        {
          roleDesc: this.editForm.roleDesc,
          roleName: this.editForm.roleName,
        }
      );
      console.log(res.meta.status);
      if (res.meta.status !== 200) {
        return this.$message.error("修改角色描述失败！");
      }
      this.editDialogVisible = false;
      this.getRolesList();
      this.$message.success("修改角色描述成功！");
    }, */
    //点击 确定按钮，修改角色描述
    editRoleInfo() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return;
        //通过则发起修改角色描述请求
        const { data: res } = await this.$http.put(
          "roles/" + this.editForm.roleId,
          {
            roleDesc: this.editForm.roleDesc,
            roleName: this.editForm.roleName,
          }
        );
        //console.log(res.meta.status);
        if (res.meta.status !== 200) {
          return this.$message.error("修改角色描述失败！");
        }
        //关闭对话框、刷新数据列表、提示修改成功
        this.editDialogVisible = false;
        this.getRolesList();
        this.$message.success("修改角色描述成功！");
      });
    },
    //点击 删除按钮，根据 参数：id 删除该角色
    async removeRoleById(id) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该用户, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      //如果用户确认删除，则返回值为字符串confirm
      //如果用户取消删除，则返回值为字符串concel
      //console.log(confirmResult);
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除！");
      }
      const { data: res } = await this.$http.delete("roles/" + id);
      if (res.meta.status !== 200) {
        return this.$message.error("删除用户失败！");
      }
      this.$message.success("删除用户成功！");
      this.getRolesList();
    },
    //点击 标签关闭按钮 删除该id的对应权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否删除该权限
      const confirmResult = await this.$confirm(
        "此操作将永久删除该权限, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("您已取消删除权限操作！");
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败！");
      }
      this.$message.success("删除权限操作成功！");
      role.children = res.data;
    },
    //展示 分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id;
      //获取所有权限数据
      const { data: res } = await this.$http.get("rights/tree");
      if (res.meta.status !== 200) {
        return this.$message.error("获取数据失败！");
      }
      //把获取到的权限数据保存到DATA中
      this.rightsList = res.data;
      //console.log(this.rightsList);
      //递归获取三级节点
      this.getLeafKeys(role, this.defKeys);
      this.setRightDialogVisible = true;
    },
    //递归方式 获取角色下三级权限的id值 保存到defKeys中
    getLeafKeys(node, arr) {
      //如果当前节点不包含children 那么它是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr));
    },
    //监听 分配权限 对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = [];
    },
    //点击确定按钮 为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ];
      const idStr = keys.join(",");
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        {
          rids: idStr,
        }
      );
      if (res.meta.status !== 200) {
        return this.$message.error("分配权限失败！");
      }
      this.$message.success("分配权限成功！");
      this.getRolesList();
      this.setRightDialogVisible = false;
    },
  },
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
//纵向上的居中对齐
.vcenter {
  display: flex;
  align-items: center;
}
</style>